Source : Webster's Revised Unabridged Dictionary (1913)

Chantry \Chant"ry\, n.; pl. {Chantries}. [OF. chanterie, fr.
   chanter to sing.]
   1. An endowment or foundation for the chanting of masses and
      offering of prayers, commonly for the founder.

   2. A chapel or altar so endowed. --Cowell.